*{
    margin: 0;
    padding: 0;
}
body{
    background-color: #f5f5f5;
}
.banner{
    width: 400px;
    height: 300px;
    background-color: rgb(150, 185, 184);
    border: black 2px solid;
    border-radius: 15px;
    margin:  50px auto 0;
    padding-left: 200px;
}
input{
    width: 200px;
    height: 20px;
}
.big{
    margin: 10px 0;
   
}
label{   
    width: 200px;
    display: block;
    text-align: center;
    font-weight: 800;
    
}
a,a:active{
    text-decoration: none;
    color: blue;
}
a:hover{
    text-decoration: underline;
}
h1{
    width: 800px;
    text-align: center;
    margin:  50px  auto 0;
    color: yellow;
}
button{
    border-radius: 10px;
    width: 80px;
    height: 33px;
    font-size: 15px;
    color: rgb(230, 82, 144);
}
body{
    background: url('https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fd.zdqx.com%2Fsjgdfjbz_121124%2F006.jpg&refer=http%3A%2F%2Fd.zdqx.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1639378391&t=22b45456abe6776848271da3fb48735d')  repeat ;

    background-size: 100%;
    }